https://github.com/jackgruber/arduino-pro-mini-lora-sensor-node

Arduino Pro Mini TTN LoRaWAN Node with RFM95 module battery-powered
https://github.com/jackgruber/arduino-pro-mini-lora-sensor-node

arduino arduino-pro-mini battery dht22 lora lorawan platfomio rfm95

Last synced: 2 months ago
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Arduino Pro Mini TTN LoRaWAN Node with RFM95 module battery-powered

• Host: GitHub
• URL: https://github.com/jackgruber/arduino-pro-mini-lora-sensor-node
• Owner: JackGruber
• Created: 2020-01-05T19:45:33.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2021-06-27T09:08:32.000Z (over 3 years ago)
• Last Synced: 2024-10-11T02:51:02.256Z (3 months ago)
• Topics: arduino, arduino-pro-mini, battery, dht22, lora, lorawan, platfomio, rfm95
• Language: C++
• Homepage:
• Size: 1.35 MB
• Stars: 28
• Watchers: 5
• Forks: 11
• Open Issues: 4
• Metadata Files:
  • Readme: README.md

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README

        
# Arduino Pro Mini TTN LoRaWAN sensor node



`Arduino Pro Mini` TTN LoRaWAN Node with `DHT22` and `RFM95` module powered by an 18650 protected battery.  

The Arduino was converted to [LowPower](https://jackgruber.github.io/2019-12-27-Low-power-Arduino-Pro-Mini/) by desoldering the power LED and the voltage converter.

## Circuit





## Case



## Diagrams 



### Battery voltage curve over 12 months with measure and send data all 5 minutes



## TTN payload decoder (v2)

```javascript

function Decoder(bytes, port) {

  var decoded = {};

  

  decoded.vcc = (bytes[0] + 200)/100;

  

  if(bytes[1] != 255){

    decoded.humidity = bytes[1]; 

    decoded.humidity &= ~(1 << 7);

    if(bytes[1] >> 7 == 1) { decoded.humidity +=0.5 }

  }

  

  if(bytes[2] != 255 || bytes[3] != 255) decoded.temperature = ((bytes[2]<<24>>16 | bytes[3]) / 10);

  return decoded;

}

```

## TTN payload decoder (v3)

```javascript

function decodeUplink(input) {

  var decoded = {};

  decoded.vcc = (input.bytes[0] + 200)/100;

  if(input.bytes[1] != 255){

    decoded.humidity = input.bytes[1]; 

    decoded.humidity &= ~(1 << 7);

    if(input.bytes[1] >> 7 == 1) { decoded.humidity +=0.5 }

  }

  if(input.bytes[2] != 255 || input.bytes[3] != 255) decoded.temperature = ((input.bytes[2]<<24>>16 | input.bytes[3]) / 10);

  

  return {

    data: decoded,

    warnings: [],

    errors: []

  };

}

```